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Finding the Fourth Proportional to 86,602.80, 129,877.20 and 34,028.40

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Solution

The fourth proportional to 86,602.80, 129,877.20 and 34,028.40 is: 51,031.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,602.80 : 129,877.20 = 34,028.40 : x
  2. Step 2: Convert to fraction form
    86,602.80/129,877.20 = 34,028.40/x
  3. Step 3: Cross multiply
    86,602.80x = 129,877.20 × 34,028.40
  4. Step 4: Simplify right side
    86,602.80x = 4,419,513,312.48
  5. Step 5: Solve for x
    x = 4,419,513,312.48/86,602.80
  6. Step 6: Final answer
    x = 51,031.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.